Bunn HC-3 service manual Troubleshooting Problem, Probable Cause Remedy

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TROUBLESHOOTING (CONT.)

PROBLEM

Dispenser is making unusual noises

Excess dust

Display not lit

PROBABLE CAUSE		REMEDY
1.	Plumbing Lines	Plumbing lines should not be rest-
		ing on the counter top.
2.	Water Supply	(A) The dispenser must be connected
		to a cold water line
		(B) Water pressure to the dispenser
		must not exceed 90 psi (620 kPa).
		Install a regulator if necessary to
		lower the working pressure to ap-
		proximately 50 psi (345 kPa).
3.	Tank Heater	Remove and clean lime off the tank
		heater. See page 33
1.	Fan	Refer to Service - Fan for testing
		procedures. See page 19
2.	Hopper Delay Board	Refer to Service - Hopper Delay
		Board for testing procedures. See
		page 22
3.	Transformer (240V 2 Wire	Refer to Service - Transformer for
Models Only)		testing procedures. See page 35
1.	Lamp	Refer to Service - Lamp, see page
		24 for lamp replacement.
2.	Lamp Holder	Refer to Service - Lamp Holder for
		testing procedures. See page 24
3.	Starter - Lamp	Refer to Service - Starter for
		testing procedures. See page 25
4.	Ballast	Refer to Service - Ballast for
		testing procedures. See page 15

11	27591 061500

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Contents Serial # HC00025000 UP Bunn HC-2Introduction Warranty27620.0000 User Notices12368.0002 Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPCold Beverage SET-UP Optional CleaningAdjustments Dispenser USEHopper Dispense Rate of Product TroubleshootingDraining the HOT Water Tank Problem Probable Cause Remedy TroubleshootingProblem Ing in serious leaks Problem Probable CauseDripping from dispense tip Lime build-up On stainless steel surfaces canTip with a thermometer Weak product Water temperatureTesting procedure. See 30 orProbable Cause Remedy Troubleshooting ProblemAuger Drive Components ServiceComponent Access ContentsHopper Assy Auger Drive ComponentsIf voltage is present as described, proceed to #5 Washer Auger Motor Locknut Dust Seal Shoulder ScrewRight HC-2 ServiceLocation Test ProcedureBallast Electronic Thermostat Optional Remove temperature probe from the tankControl Thermostat Location Mechanical ThermostatThermostat Terminals Control ThermostatDispense Switch Dispense SwitchFAN Test ProceduresPull the mixing chamber 2 out of the whipper chamber Frother and Whipper MotorSteam Collector #6-32 Screw Mixing Chamber RingWhipper Motor Terminals Frother and Whipper MotorReconnect the eight pin connector to the hopper delay board Hopper Delay BoardDisconnect the wires from the switch termi- nals HOT/COLD Switch OptionalDoor Assy Lamp Replacement Refer to FigLamp Holder Service Level Control Board and Probe Level Control Board and Level ProbeLimit Thermostat Level Board TerminalsOverflow Protection Switch Overflow Protection SwitchRUN/RINSE Switch RUN/RINSE SwitchCold Water Solenoid Valve Solenoid Valve Cold Water OptionalSolenoid Valves Dispense Cold Water Solenoid TerminalsSolenoid Valve Inlet Solenoid Valves DispenseDisconnect the water line from the solenoid valve Tank Heater Solenoid Valve InletTank Heater Refer to when reconnecting the wires to the tank heaterTank Heater Switch Tank Heater Switch Terminals Tank Heater SwitchMODELSONLYcont Transformer 240V TWO WireSchematic Wiring Diagram HC-2, & HC-3 Schematic Wiring Diagram HCA-2, & HCA-3